Christine A. Varney, the Assistant Attorney General of the Antitrust Division of the US Department of Justice (DOJ), has warned that the DOJ intends vigorously to enforce the antitrust laws in the current distressed economy. In addition, Varney has discussed the Antitrust Division's approach to enforcement regarding single-firm conduct under section 2 of the Sherman Act, section 1 of the Sherman Act, and the challenges that the DOJ faces in the future.